Question

on the 4 major or math tests given this term, awilda had grades of 78,84,69,83 she would like her test average to 80 what mark must awilda get on her next test

Answer 1

\[\frac{78+84+69+83+t}{5}=80\]

Answer 2

solve for t

Answer 3

ok

Answer 4

do you understand who I got that equation?

Answer 5

yea i guess

Answer 6

you guess?

Answer 7

do u divide?

Answer 8

if we average 5 numbers then
\[\frac{a+b+c+d+e}{5}=average\]
in your case we are given the first 4 numbers, we need to find the 5th

Answer 9

so add the top and divide it by 5?

Answer 10

\[\frac{78+84+69+83+t}{5}=80\]
multiply both sides by 5
\[78+84+69+83+t = 400\]

Answer 11

can you solve the rest?

Answer 12

ok im going to solve it

Answer 13

80?

Answer 14

314+t = 400

Answer 15

now can you solve it?

Answer 16

86 i meant

Answer 17

You get an average by adding the numbers together and dividing by the number of integers. In this case, there are 5 numbers. You have to add them together and divide them by 5 with the end result being 80.

Answer 18

correct

Answer 19

thanks man!

Answer 20

np